With some innovation and a little help from the cheerleaders, you manage to tie with Elsie.

Nobody says 'Go', but a few minutes later your hands are flying up and down your siblings' shafts, helped along by the steady churn of precum from their heavy balls. Nevertheless, their sheer size forces your hands to stay focused on their heads and sensitive tips, caressing the slimy flesh and squeezing the hardness underneath. Elsie in particular seems to enjoy it when you grind your palm against her cum slit, loosing a breathy moan and extra thick spurt of pre each time you do.

Fiona meanwhile hasn't offered up much in way of reaction, though when you shoot glances her way you notice her mouth is pressed in a thin line and she seems to be putting as much of her focus as she can on the porno.

"Come on slut, stroke harder." She mutters at one point, but you figure that at least means you're doing adequately, given the lack of ridicule.

That said, adequate isn't going to cut it. Your sisters have been giving as good as they've gotten and its starting to tell. First Elsie wrapped her fingers loosely around you, dragging them up and down your shaft - gentle as can be - before darting down to caress and coax your balls. She brought you to an exquisite hardness before Fiona took over, gripping your prick with spit slick fingers and jerking them rapidly across your length. If Elsie caused your arousal to swell, then Fiona threatened to make the pleasure spike past the breaking point. Add on the fact that _holy fuck, my freaking sisters are jerking me off _and you're well past the point where you can think about much beyond spurting your load into their silky grips.

The only thing you've got going for you at this point is the porno. At this point the football team has lined each cheerleader up outside the bus and they're fucking them in unison, the bubble butted, coed cunts stretching obscenely around thick cocks almost big enough to rival your sisters. And Elsie is seriously into it if the way she's started pinching her nipples and thrusting her hips in time to the movie means anything. And that's my chance, if I'm going to have one the last sane part of your brain whispers, a desperation play sliding into place.

Focusing all your attention on Elsie, you lean closer to your sister to whisper into her ear, "Fuck, isn't this movie awesome, all those sluts lined up for cock. I bet you wished you could shoot your load down their tight cunts, pump em full of your baby batter..."

You back up the statement by abandoning Fiona's cock entirely and bringing your free hand to cup Elsie's swollen spunk-factories, squeezing in rhythm with her thrusts. Your dirty talk, plagiarized from a porno but who cares, seems to do the trick as Elsie bites her lip, abruptly arching her back forward, nightie clad tits jutting out as her eyes widen and her dick throbs in your hand. She's on the edge, but so are you. In a frantic glance over your shoulder you can see Fiona turned towards you, eyes narrowed in irritation and she's started jerking you ruthlessly. Obviously she's not oblivious to your play and you doubt you're going to last more than a few seconds but at this point the need to win, or at least not lose, is overwhelming and you stop thinking about the contest, stop thinking at all, and do what it takes to make Elsie cum.

Ducking your head down, your wrap your lips around your little sister's tip, mouth instantly filled with the taste of her pre, stunned for a moment as you go down on your first dick, but then your tongue comes up, wrapping and coiling around your younger sister as you bob your head forward, taking as much of her dick into your mouth as you can - even as your own climax starts to rise in one hot, heavy stream of pleasure from your taut balls.

Dimly you make out Elsie gasping, moaning out your name as her hands take hold of your head and **** you deeper, her hips thrusting up as she shouts,"Oh fuck, oh fuck that's right big bro- I'm cumming... I'm shooting my load down your throat! Take it! Ohh, ohhhhhh fuck yea, take my spunk!"

Its too much for Elsie and before you can react your mouth is being flooded with bitter ropes of sister-spunk, your own load pumping out simultaneously to coat Fiona's fingers while Elsie drags you down her shaft, cum filling up your mouth too fast for you to react and you've got **** but to swallow her potent load again and again because it just doesn't seem to end.

Finally, Elsie lets out a long, blissful moan as the last spurts drip from her cock, your own orgasm long since ended, and she drags her dick out of your mouth, letting it flop heavily atop your face while the remains of her load trickle from your mouth to pool between her thighs. For a moment you just stay there, head on Elsie's lap, her thick meat draped across your face, several strands of glistening spunk and spit still connecting the two of you... And that's when you hear a phone camera go off.

Twisting around you see Fiona standing above the two of you, dick jutting out proud and erect, and above that her hands holding her phone as she glares down at the pair of you.

"What a fucking Kodak moment," she drawls in a sickeningly sweet voice, "almost enough to make me overlook the fact you're a cheating little bitch."